PDF Fanuc Power Mate i-D/H Parameter Manual

B63180EN/02
4. DESCRIPTION OF PARAMETERS
135
NOTE
To use a varied loop gain on a gearbygear basis, set
parameter No.5280 to 0, and set a loop gain for each gear
in parameters No.5281 through No.5283. The specification
of a loop gain on a gearbygear basis is disabled if
parameter No.5280 is set to a value other than 0. In such a
case, the value set in parameter No.5280 is used as a loop
gain that is common to all the gears.
5291
Spindle loop gain multiplier in the rigid tapping mode (for gear 1)
5292
Spindle loop gain multiplier in the rigid tapping mode (for gear 2)
5293
Spindle loop gain multiplier in the rigid tapping mode (for gear 3)
[Data type] Word
[Unit of data]
[Valid data range] 0 to 32767
Set the spindle loop gain multipliers for gears 1 to 4 in the rigid tapping
mode. The thread precision depends on the multipliers. Find the most
appropriate multipliers by conducting the cutting test and assign them to
the parameters.
NOTE
These parameters are used for analog spindles.
Loop gain multiplier = 2048 E/L α 1000
where;
E : Voltage in the velocity command at 1000 rpm
L : Rotation angle of the spindle per one rotation of the spindle
motor
α : Unit used for the detection

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